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Thesaurus conchyliorum or Monographs of genera of shells . Mil JL HI Th Fl GS SoMTcrby Mitra Plate III Illustration plates biodiversitylibrary org title Sowerby Sowerby Biodiversity Heritage Library Thesaurus conchyliorum or Monographs of genera of shells plates Mollusks Pictorial works Smithsonian Institution Libraries